keepass.io is a Node.js library for reading and writing KeePass databases. Please note that currently only the newest database version, called KDBX, is supported. Features include so far:

Password and/or Keyfile credentials: keepass.io supports both of the most common used credential types for KeePass databases.

Powerful API: This library offers you a powerful API, which even allows you raw access to the database, so even unsupported third-party fields can be modified.

Joyfully simple and flexible: I've built keepass.io to be easily understandable and a joy to use. It's built with JavaScript and tries to provide a solid foundation for modifying KDBX databases.

Stunning performance: To further improve performance, keepass.io even includes an optional native library, which will help while performing the key transformations. If your system should not have the Crypto++ Dev Libraries installed, it will automatically fallback to the slower Node.js methods.

Note: keepass.io is currently under active development. As such, while this library is well-tested, the API might change at anytime. Consider using it in production applications only if you're comfortable following a changelog and updating your usage accordingly.

As mentioned above, keepass.io is really easy to use. The following example code opens a database, outputs its name, changes the name to 'KeePass.IO rocks!' and saves the database with new credentials. More examples are available within the examples folder.